Filter-press.



`PATBNTE'D JAN. V13, 1903'.

INVENTOR 0. 0 9 1. 2r 2 V. o .N D n T. f f P N 0 I T A o I L P P W. SOISLIMER. FILTER PRESS.

TH: Nomus PETERS co. :mom-urna.. wAsHlNarnN. n. c.`

N0 MODEL C q1 y@ a M@ )MC2 UNITED STATES PATENT OFFICE.

WILHELM SOMMER, OF FRTH, GERMANY, ASSIGNOR TO FILTER- 95 BRAU- TECl-INISOI-IE MASCl-IINEN-FABRIK, ACTIEN GESELLSCHAFT, FORMERLY L. A. ENZINGER, OF WORMS, GERMANY, A CORPORATION OF GERMANY.

FILTER-PRESS.

SPECIFICATION forming part of Letters Patent No. 718,397, dated January 13, 1903.

Application filed November 22.1900. Serial No. 37,357. {No model.)

To @ZZ whom it may concern:

Be it known that LWILHELM SOMMER, master brewer, of Frth, in the Kingdom of Bavaria and Empire of Germany, have invented new and useful Improvements in Filter- Presses, of which the following is a specilication.

This invention relates to the construction of filter-presses; and its object is to provide 1o means whereby the filtering-surfaces may be at all times completely covered with the iiuid under ltration with a uniformly-constant pressure and without any counter-current.

It consists in a filter formed of a series of I5 ilatframescontainingiilteringmaterial,alter nating with a series of grids-or open-work structures which lsupport the .filter-sheets against the pressure of the iiuid and at the same time act as passage-ways for the fluid 2o through the filter.

The invention is illustrated in the accompanying drawings, in which- Fignre 1 is a side view of one'of the frames containing the filtering material. Fig. 2 is a similar view of the upper portion of one of the grids forming the passage-ways from and to the filtering material and supporting the latter. Fig. 3 is a vertical cross-section of the filter on an enlarged scale.

The filter is composed of a series of flat frames b, of identical form, alternating with aseries of grids c c', which are also of identical form, the only diierence between the grids c and c' being in their arrangement in the fil! ter, grids c being reversed with respect tov the grids c, as hereinafter explained. The grids c and c are formed of an exterior framework 02 and provided with a rectangular opening in the center, across which extend bars e I 4o for supporting the filter material against the interior of the grids c c' by a plurality of vertical Vports d d', formed in one side thereof, the ports d being formed in the upper side of the grids c and the ports d in the lower side ofr the grids c. It will be understood that in practice the casting for the grid c is the same as for the grid c', the grid c being merely reversed to form a grid c. In the upper and lower sides of both the grids c c and theframes b are also formed alined trans- 6o vers'e openings d, which when the frames and grids are assembled, as shown in Fig. 3, cooperate to form continuous passage-ways w and y in the top and bottom of the filter and serving, respectively, as inlets and outlets for the fluid to be filtered. Grooves h are also formed in the framesvrb to receive packing material 'i for the preventionof leakage.

In the operation of the invention the uniiltered material will be caused to enterby ap- 7o.

propriate connections through1 the passageway a; and passing through the-passage-ways d will enter the interior of the grids c and ill the latter. A steady and uniformpressure K will thus be created upon the iilter material fyand by reason of the narrowness of the space between veach pair of plates?) eddy or counter currents will be prevented. Thence passing through the iiltering material, the iiuid will flow down the rear surface of the 8o latter and enter the grids c and thence, draining through the ports d, may be Withdrawn through thevoutlet-passage y. y

It will be understood that the grid-bars e may beomitted from the frame c in the front 85 face of the filterplates without affecting the invention, as the filter-plates would still be held in place by the pressure of the fluid on their faces.

Having thus described my invention, what 9o I claim, and desire to secure by Letters Patent, is Y l. A filter-press comprising a stack of two alternating series of framed iilter-plates having central openings therein and other openings at the top and bottom sides thereof combining to form inlet and outlet passages respectively, the first said series being formed with grid-bars across the central opening thereof and a groove about the periphery of rco said opening, and the second said series having ports communicating alternately with the inlet and outlet passages, and a shoulder interlocking With said grooves about the central aperture thereof, other grooves formed in one of each pair ot abutting faces around and between all three sets of openings, paci;- ing material lying in said lastmentioned grooves, and sheets of filtering material clamped between said interlocking groove and shoulder.

2. In a filter-press, a plate formed with a central opening and other openings on each side thereof, a port connecting the central opening with the side openings on one side, and a taper shoulder formed around the pe riphery of said central opening on one face of the plate and adapted to interlock with a corresponding groove formed on the adjacent plate to hold a sheet of filter material.

3. A lter-press comprising a stack of two alternating series of framed fllterplates having central openings therein and other openings forming inlet and outlet passages respectively at the top and bottom sides thereof, the first said series being formed with gridbars across the central opening thereof and a groove around the periphery of said opening, and the second said series having ports coni- 1n unicating alternately with the inlet and outlet passages, a shoulder interlocking with said groove around the periphery of the central opening thereof, other grooves form ed in one of each pair of abutting faces around and between all three sets of openings, packing material lying inthe last-mentioned grooves, and sheets of filtering material clamped between said interlocking grooves and shoulders.

In testimony whereof:l I have hereunto subscribed my name this 11th day of September, i900.

WILHELM SOMMER.

Vitnesses:

JOHANN SCHMIDT, OSCAR BooK. 

